Internal-combustion engine



Nov. 2o, 1928.

lE. C. GUNDELACH INTERNAL COMBUSTIQN ENGINE 2 sheets-sheet 1 Filed Feb. ll 1927 v INVENTOR 27. C. Guzzdelaaf/ BY ATTOR N EY Nov. 2o, 192s. 1,692,730

. E. C. GUNDELACH INTERNAL COMBUTION ENGINE Filed' Feb. 1, 1927 2 sheets-sheet 2 WITNESSES .E C Gudgluch ATTORNEY Patente-d Nov. 20, 1928.

UNITED STATES EMIL C. GUNDELACH, OF NEW ROCHELLE, NEW' YORK, ASSIGNOR OF ONE-HALF TOA ROBERT J. iiHLnns,

PATE-Nr oFFlecE.

OF NEW YORK, N. Y.

INTERNAL-consumida ENGINE.

Application filed February This invention relates to internal combustion engines and has for an object to pron vide an improved structure which will insure a thorough exhaustion of the vproducts of combustion and prevent the incoming new charge from mixing with any of the old products of combustion whereby a maximum result is secured from the fuel.

Another object of the invention is to providey an improved arrangement of parts whereby the sparking device is not exposed to the gas or products of combustion except for a very brief time whereby the deposit of carbon thereon is prevented.

A further object, more specifically, is to provide an improvement over niy prior Patent No. 1,183,641, wherein certain rollers and cont-act members have been dispensed with and wherein improved cams and connecting parts have been provided for securing a back and forth rotary movement to the valve.

In the accompanying drawings- Figure 1 is a longitudinal vertical sectional view through an internal combustion engine disclosing an embodiment of the invention.

Figure 2'is a transverse sectional view through Figure 1 on line 2-2.

Figure 3 is a transverse sectional view through Figure 1V on line 3-3.

Figure 4 is a fragmentary side view of that part of Figure 3 showing the inlet and outlet ports. y

Figure 5 is a side view of a cam disclosingcertain features of the invention.

Figure 6 is a view of a rotating cam disclosing certain features of the invention.

Figure 7 is a side view of a stationary cam designed to co-act with Figure (l.

Figure S is a side view of the valve and cam end shown in Figure 1, the same dis` closing; certain features of the invention Figure 9 is a diagram partly in sect-ion, showing the position of certain parts at the beginning of the suction stroke.

Figure 10 is a view similar to Figure 9 and showing certain parts in the position occupied at the beginning of the compression stroke.

Figure 11 is ay view similar to Figure k9 but showing certain parts in the position at the beginningof the power stroke.

9 continually meshing with the gear 10,v

which. gear is rigidly secured to what may be called the cam shaft 11. The cam shaft 11 is provided with a worin 12 continually mesh# ing with the worin gear 18, which worm gear rigidly secured to the shaft 14. By this' forni of connection or any other suitable forni of connection, the shaft 14 rotates in proper time with the movement of the crank shaft 5.

For the purpose of lubrication, the shaft 14 is made with a small bore extending almost entirely therethrough and with laterally extending openings for the passage of oil. This shaft is provided with grooves 15 which ai'e adapted to receive the splined keys 16, said splined keys being rigidly secured in any-desired manner to the tubular member 34. The

cam 17 is provided with cam faces 18 and 19, cani face 1S co-acting with a cam iace 2O of cam 21 while the cam face 19 co-acts with the cam face 22 of the cam 23. All of these cams are preferably made hollow so that all parts ofthe cams will be of substantially the same thickness and thereby an evenl expansion and contraction is provided as well as an even cooling action.

`Preferably, a bearing sleeve or tubular member 34 is mounted in the cani 21 and sui'- iounds the shaft This bearing sleeve preferably held. against movement by friction while the shaft 14 freely revolve therein. The sleeve 34 also acts as a. fiictional support for the gear wheel 18, said gear wheel being held against longitudinal movenient in the opposite direction by the thrust bearing 25. The' cam 2-1 may be held in place by any desiredmeans, as for instance, by the bolts 26 passingI through the cap or casing 27 and also through part of tliecam '21 into the shell or casing 2.

ca'sing2 at the lower part is formed hollow The shell or lil \ Vof t-he port l 37 with the inlet outlet port 39 and with the spar t plug openand acts as a water jacket for cylinder 2 and for valve 28 and associated parts. Rigidly secured to the upper part of the valve 28 is a cam 29 having a cam face 30 co-actinor with the lower part of cam 23. As the cam face 18 of cam 17 moves up over face 20 of cam 21, the cam face 30 moves up over the cam face 31 of cam 23. From Figure 1 it will be noted that the cam 23 is held against movement by suitable locking screws 32. Also, from Fig'- ure 1, it will'be noted that an air opening 33 is provided whereby air may be sucked in and then forced out for assisting in cooling the various cams and associated parts. The shaft 14 at its lower end telescopically lits into the tubular member 34 which is rigidly secured tothe upper part of the valve 28 by any suitable means, as l for instance, pin 35. The tubular member 34 extends upwardly preferably to near the top of the cam 17 and is` rigidly secured thereto by a pin 36 or other suitable means whereby whenever shaft 14 is rotated sleeve 34 will also be rotated as well as cams 17 and 29. As the tubular member 34 and cam 29 are rigidly secured to the upper part of valve 28, said valve will be also rotated and as the cams 17 and 29 move upwardly over the cam faces 2O and 31, valve 28 will be given a rotary/movement in addition to an upward movement. Cams 17 and 29 are connected tothe tubular member 34 and move in unison. `The cam surface 20 of the cam 21, and thecam surface 31 of the stationary cam 23, function in association with the cam surfaces 18 and 30 respectively, to force the valve 28 downwardly. The cam surface 20 of cam 21, preferably acts at the same time as the cam surface 31 to force downwardly the valve 28 and associated parts. This causes an even smooth downward action of the parts. After the parts have been moved downwardly to their extreme lower position, and certain further movements have taken place, therupper surface 31 of cam 23 acts on the lower surface of cam 17, which is rigidly secured to the tubular member 34 and to the valve 28, to lift the valve and combustion chamber to their uppermost position. In this way, the two coactingcam surfaces actto lift the valve and associated parts, while two sets of cio-acting surfaces are preferably used for forcing the valve 28 and associated parts downwardly.

The valve 28 is provided with a single port 37 saidvalve rotating and reciprocating at the same time to cause a proper registration ort 38, the

ing 40 The shapes ofthe various cam faces are. designed to accomplish the result just mentioned and to not only raise and lower the valve 28 at the proper time but to cause a rotation of said valve without reciprocation as will be fully explained hereinafter.

From Figures 9, 10, 11 and 12, it will be seen that the upper extension 3 of piston 3 of the cams heretofore described, will gradually rotate and also move upwardly until the parts assume the position shown in Figure 1() whereupon the pist-on is beginning its compression stroke and the intake port 38 is completely closed.l On the `compression stroke, the valve rotates on a straight line and does notgo up or down either on compression or tiring stroke butY starts to openV (or come down) on the very last end of the firing stroke to give the exhaust gases a chance to get out, that` is, when the piston starts to come up to push out the exhaust gases the valve is partly open. The mechanism is, of course, properly timed to produce a spark by the spark plug as soon as the opening 40 has been fully uncovered. This fires the explosive mixture drawn in by the' intake stroke and the piston 3 begins to move downwardly under its power stroke. As the piston moves downwardly under its power stroke, the valve 28 will rotate to a certain extent but not move downwardly. Atthe end' of the firing stroke and the beginning of the exhaust stroke, the piston will move upwardly and the valve will also move downwardly and rotate until at the completion of the exhaust stroke the parts will be in the vposit-ion shown in Figure 12. On the intake stroke, the pis ton moves downwardly and thevalve upwardly to help suck in the fresh gasand on the exhaust stroke the piston comes up and the valve comes down to meet the piston to help expel all dead gases from the cylinder.

By reason of the arrangement of cams and other parts, a smooth action is secured while the incoming recharge of gas is prevented from mixing with any products of combustion while ample provision is made for thel proper admission of the new gas. The use of the cams and other parts as described, sim plifics the structure shown in nl yprior patent and will reduce all the parts and particularly the moving' parts to a minimum of wear.'

As indicated in Figure 1, shims 41 and 42 have been provided so that when there is any appreciable wear on the cams, in the course of time, some of these shims may be removed and the parts tightened, whereupon the wear is taken up. Also, in order that the parts may be properly lubricatedyan oil pipe is connected with the opening 43 whereby oill may be pumped from the crank casing and forced through this opening continuously to Hood the various parts and keep the moving parts properly lubricated.

lVhat I claim is:

l. An internal combustion engine comprising a cylinder provided with an inlet port and an exhaust port, an ignition device carried by said cylinder, said ignition device and ports being approximately in the same horizontal plane with the ignition device p0- sitioned intermediate said ports, a piston adapted to reciprocate in said cylinder, said piston having a reduced upper extension, a. reciprocating and rotary valve positioned in the upper end of said cylinder and provided at itsl lower portion with a working chamber into which said extension of the piston extends, said valve having a single port adapted to register successively with said inlet port., said ignition port and saidv exhaust port, a series of stationary cams, and a seriesof movable cams co-acting with said valve for causing the same to rotate and reciprocate in proper time with the movement of the piston.

2. In an internal combustion engine a cylinder provided with an ignition port, and exhaust port, an ignition device on said cylinder, said ports and said ignition deviceI being approximately in the same horizontal plane and the said ignition device being located intermediate said ports, a piston positioned to reciprocate in said cylinder, and a valve mounted to rotate andto slide up and down in said cylinder, said valve having its lower end provided with a working chamber into which extends the upper end of said piston during the exhaust stroke, the wall of said working chamber being provided with a single port adapted to register successively with said inlet port, said ignition device and said exhaust port, rotating means for causing said valve to rotate, and rotating cams connected with said rotating means for causing the valve to reciprocate in the direction of its axis whereby during the exhaust stroke the upper end of the piston and the valvel are brought very near each other and at the compression stroke the upper end of the piston and the valve are spaced sufliciently to provide a f compression chamber.

3. In an internal combustion engine, a reciprocating and rotating valve, a driving shaft, a tubular member attached to said valve and slidingly connected with the driving shaft whereby the valve will be rotated, a cam rigidly secured to said tubular member, and stationary cams co-acting with the ,gle valve provided with a single port, a continuously rotating shaft, a tubular member rigidly secured to said valve and splined on said shaft whereby as the shaft rotates the valve will rotate, a plurality of stationary cams surrounding the shaft and tubularV member, and a rotating cam rigidly secured to the tubular member and co-acting with the stationary cams for raising and lowering the tubular member and valve as the shaft rotates these members.

5. In an internal combustion engine a rotating and reciprocating valve adapted to be positioned in the upper partk of the cylinder of the engine, a sleeve rigidly secured to said valve, a continuously rotating drive shaft fitting into the upper part of said sleeve, means for slidingly connecting the sleeve with the shaft so that the sleeve may telescope over the shaft, but rotate therewith, a cam rigidly secured to said sleeve, and a stationary cam arranged on each side of the first mentioned cam co-acting therewith for causing the first mentioned cam to raise and lower the sleeve and valve as the sleeve is rotated, said cams being so formed as to hold the valve againstdownward movement during the compression and power strokes.

6. An internal combustion engine comprising a cylinder provided with an inlet port and an exhaust port, an ignition device carried by the cylinder, said ignition device and.

said ports being approximately in thel same horizontaly plane with the ignition device vlocated intermediate said ports, a piston positioned to reciprocate in said cylinder, al reciprocating and rotary valve positioned in the upper end of said cylinder and co-acting with the piston to cause a proper intake and exhaust, said valve being provided with a single port adapted to register successively with said inlet port, said ignition device and said exhaust port, a plurality of cams connected with said valve and rotatable therewith, a stationary cam arranged between certain of said first mentioned cams and co-acting therewith for imparting a sliding movement to the valve in the direction of its axis to move the valve upwardly and downwardly.

EMIL C. GUNDELACH. 

